111212110121144 has 32 divisors (see below), whose sum is σ = 208659065610240. Its totient is φ = 55569703452000.

The previous prime is 111212110121143. The next prime is 111212110121171. The reversal of 111212110121144 is 441121011212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212110121143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81912617 + ... + 83259239.

It is an arithmetic number, because the mean of its divisors is an integer number (6520595800320).

Almost surely, 2^{111212110121144} is an apocalyptic number.

It is an amenable number.

111212110121144 is a deficient number, since it is larger than the sum of its proper divisors (97446955489096).

111212110121144 is a wasteful number, since it uses less digits than its factorization.

111212110121144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353371 (or 1353367 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 23.

Adding to 111212110121144 its reverse (441121011212111), we get a palindrome (552333121333255).

The spelling of 111212110121144 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, one hundred twenty-one thousand, one hundred forty-four".